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CNT facilitated interfacial charge transfer of TiO2 nanocomposite for controlling the electron-hole recombination
- Source :
- Solid State Sciences. 112:106492
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- We studied the nucleation and growth of TiO2 nanoflowers and carbon nanotubes-TiO2 nanocomposite (n-CNT-TiO2) by the hydrothermal method in a single step at 150 °C and tested them for the photocatalytic degradation of MB. The microstructural analysis confirmed the transformation of TiO2 nanoflowers to CNT-TiO2 spheres due to the role of surface energy of CNT. The XRD peak profile analysis of TiO2 and n-CNT-TiO2 confirmed the formation of pure rutile phase of Titania sintered at 400 °C. A red-shift in the bandgap of n-CNT-TiO2 nanocomposite (2.7eV) was observed due to the donor states towards the conduction band edge. The core-level of XPS showed the strong interaction between carbon and titanium atoms. The CNT facilitate the interfacial charge transfer or avoid the formation of charge recombination due to the variation of Ti4+ to Ti3+ sites. The highest photocatalytic degradation was achieved by using the photocatalyst of n-CNT-TiO2 nanocomposite. The incorporation of CNT provides the interfacial charge transfer facility that creates new interbands energy states for the delay of electron-hole recombination, which cater the environmental remediation.
- Subjects :
- Nanocomposite
Materials science
Band gap
Nucleation
chemistry.chemical_element
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Surface energy
0104 chemical sciences
chemistry
X-ray photoelectron spectroscopy
Chemical engineering
Rutile
Photocatalysis
General Materials Science
0210 nano-technology
Titanium
Subjects
Details
- ISSN :
- 12932558
- Volume :
- 112
- Database :
- OpenAIRE
- Journal :
- Solid State Sciences
- Accession number :
- edsair.doi...........0defac12311f138145e2211e2563f90b